Replace guesswork with precision — standard and custom lug butterfly valve bolt patterns for ANSI, DIN, and JIS flanges. Reduce installation errors, prevent leaks, and cut downtime by up to 40%.
For: Purchasing Managers, Technical Directors, Operations Managers, and Supply Chain Professionals in water treatment, HVAC, chemical processing, and industrial piping systems.
📥 Download Free Bolt Chart PDF + Get Quote in 24h37% of field installation failures stem from incorrect bolt-hole alignment between valve and flange. A wrong chart means costly rework, delayed startups, and frustrated engineering teams.
Over-tightening cracks the valve body; under-tightening causes leaks. Without a verified bolt chart, torque specs are a guessing game — leading to valve failure within 6 months.
Suppliers who only offer vague drawings leave your team scrambling. You need bolt length, thread type, material grade, and tightening sequence — all in one place.
ANSI B16.5 vs. DIN 2501 vs. JIS B2220 — each standard has different bolt dimensions. One mistake in procurement can delay an entire project by weeks.
Emergency orders for the correct bolts, expedited shipping, and overtime labor add up fast. A clear bolt chart upfront eliminates these unplanned expenses.
Your crew is on-site, ready to install, but the bolts don't fit. Every hour of downtime costs thousands. A precise bolt chart keeps your project on schedule.
You don't have to settle for incomplete data. See our verified bolt chart specs below.
Our bolt charts are built from 10+ years of field-tested manufacturing data, covering ANSI Class 150, 300, and PN10/PN16/PN20 flanges. Every dimension is verified against physical stock to ensure 100% accuracy.
Number of bolts, bolt circle diameter, hole size, and bolt length for every size from 2" to 24" (DN50 to DN600).
Bolt material recommendations: ASTM A193 Gr B7, A304 stainless, or duplex. Includes yield strength and corrosion resistance data.
Recommended torque values in Nm and ft-lbs, plus cross-tightening pattern to ensure even gasket compression and zero leaks.
ANSI B16.5, DIN 2501, JIS B2220, and AS/NZS 4087 — one chart for your global projects.
Need a non-standard bolt pattern? Our engineers create custom charts for your specific flange in under 48 hours.
Get the full bolt chart in a print-ready PDF, including installation instructions and torque tables.
Complete chart available for download. All dimensions in inches (mm available in PDF).
| Valve Size (inch) | DN (mm) | No. of Bolts | Bolt Circle Dia. (in) | Hole Size (in) | Bolt Length (in) | Torque (ft-lbs) | Bolt Grade |
|---|---|---|---|---|---|---|---|
| 2" | 50 | 4 | 4.75 | 0.62 | 2.50 | 30-35 | B7 |
| 3" | 80 | 4 | 6.00 | 0.75 | 3.00 | 45-55 | B7 |
| 4" | 100 | 8 | 7.50 | 0.75 | 3.25 | 55-65 | B7 |
| 6" | 150 | 8 | 9.50 | 0.88 | 3.75 | 75-90 | B7 |
| 8" | 200 | 8 | 11.75 | 0.88 | 4.25 | 100-120 | B7 |
| 10" | 250 | 12 | 14.25 | 1.00 | 4.75 | 130-150 | B7 |
| 12" | 300 | 12 | 17.00 | 1.00 | 5.25 | 160-185 | B7 |
lug style butterfly valve bolt chart lug type butterfly valve bolt chart lug butterfly bolt chart
Need a custom bolt chart for your project? Our engineering team can create one in 48 hours. Request yours now.
A lug butterfly valve bolt chart provides the exact bolt pattern dimensions — including number of bolts, bolt circle diameter, hole size, and bolt length — for a specific valve size and flange standard. You need it to ensure your valve bolts align correctly with your pipeline flanges, preventing leaks, installation delays, and costly rework.
Our bolt chart covers ANSI B16.5 Class 150 and 300, DIN 2501 PN10/PN16/PN20, JIS B2220 5K/10K, and AS/NZS 4087. We also provide custom charts for non-standard flanges upon request.
Yes. Every bolt chart includes recommended torque values in both Nm and ft-lbs, plus a cross-tightening sequence diagram to ensure even gasket compression and zero leaks.
Absolutely. Our engineering team can create a custom lug butterfly valve bolt chart tailored to your exact flange dimensions, material requirements, and operating conditions. Typical turnaround is 48 hours.
For corrosive environments, we recommend ASTM A193 Gr B7 with zinc plating, A304 or A316 stainless steel, or duplex stainless steel. Our bolt chart includes material grade recommendations based on the service medium.
Your pipeline flange size (in inches or DN) directly determines the valve size. Our bolt chart includes a cross-reference table so you can match your flange standard and size to the correct valve and bolt specification.
Yes. We offer free samples for qualified buyers. You pay only for shipping. This allows you to verify the bolt chart accuracy and valve quality before committing to a full order.
For standard sizes with ANSI or DIN flanges, lead time is 7-15 days. Custom bolt patterns may require 15-25 days. We also offer express production for urgent orders.
We ship via sea, air, or express courier (DHL, FedEx, UPS) depending on your urgency. Our logistics team handles all documentation — including COO, packing list, and bill of lading. We deliver to over 50 countries with a 98% on-time delivery rate.
Still have questions? Ask our engineering team — we typically respond within 2 hours.
"Thriveon's bolt chart was spot-on for our 8-inch ANSI 150 lug valves. The installation team finished ahead of schedule, and we've had zero issues in 6 months of operation. Highly recommended."
"We were struggling with inconsistent bolt patterns from our previous supplier. Thriveon provided a custom bolt chart for our DIN flanges, and the valves fit perfectly. Great technical support."
"The level of detail in Thriveon's bolt chart is impressive. They included torque specs, tightening sequence, and even material recommendations for our sour gas application. Class act."
"As a procurement manager, I appreciate having a single source of truth for bolt data. No more chasing suppliers for missing dimensions. Thriveon delivers what they promise."
"We ordered 12-inch lug valves for a wastewater plant. The bolt chart made installation straightforward, and the valves have been performing flawlessly. Excellent quality and service."
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South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
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What Our Customers Say
"The lug butterfly valve bolt chart from Thriveon saved us 3 days of installation time. Every dimension matched perfectly. We've placed 4 repeat orders since."
— Thomas R., Project Manager, AquaTech Water (USA)
✅ 40% faster installation | Zero rework
"We had been using a generic bolt chart from our previous supplier that caused repeated leaks. Thriveon's chart was accurate down to the last millimeter. No more leaks."
— Dr. Khalid A., Technical Director, PetroChem Global (Saudi Arabia)
✅ 100% leak-free since installation
"As a procurement manager, having a verified bolt chart upfront made my job easier. No back-and-forth with engineers. I trust Thriveon's data."
— Sarah L., Procurement Manager, BlueFlow Systems (UK)
✅ 50% less procurement time